/Engine/Source/Runtime/Experimental/Chaos/Public/RewindData.h
Extract some history information before cleaning/pushing state
void ExtractHistoryState ( [FGeometryParticleHandle](API\Runtime\Chaos\Chaos\FGeometryParticleHandle) & Handle, int32 & PositionValidCount, int32 & VelocityValidCount, int32 & PositionNextIterator, int32 & VelocityNextIterator )